Marker for pavements



Feb.v25, 1930. L. G. WOODS MARKER FOR PAVEMENTS Filed Jan. 2, 1929 2 Sheets-Sheet l INVENT OR .iwmts 6% wnuegsas I Feb. 25, 1930. L. s. WOODS I 1,748,466

MARKER FOR PAVEMENTS Filed Jan. 2, 1929 2 Sheets-Sheet 2 Patented Feb. 25, 1930 LEONARD G. WOODS, OF PITTSBURGH, PENNSYLVANIA MARKER FOR PAVEMENTS Application filed January 2, 1923. Serial No. 329,868.

My invention consists in a marker for concrete roads and other pavements, and, as I employ it, it serves to demarcate one line of travel from another, though as will be apparent it may serve to indicate position for any particular end.

Embodiment of the invention is illustrated in the accompanying drawings. Fig. I'is a view in vertical section of a fragment of a roadway, showing in end elevation certain metal parts, one of which is the marker of my invention. Figs. II and III are views in plan and in side elevation of the said metal parts in assembly, the body of concrete being, for purposes of illustration, omitted. Figs. IV, V, and VI are views corresponding to Figs. I, II, and III, but illustrating the marker with a certain modification or elabo ration of structure.

In Letters Patent of the United States, No. 1,666,613, granted me April 17, 1928, I have shown and described the parting strip commonly employed in the building of con crete highways, and aparticular means of unit: ing lengths of the parting strip end to end, the uniting means being the subject matter of the invention of the said Letters Patent. It is for cooperative use with such a parting strip that. I have developed the marker of my in- I vention. The parting strip ordinarily extends on the mid-line of the highway, and it is along that mid-line that a succession of the gaarkers of my invention may advantageously e set.

The parting strip 1 here chosen for pur poses of illustration is of a now familiar shape, and includes a V-shaped channel with wide marginal flanges, set with the flanges extending in vertical plane. The strip is staked to position on the sub-grade of the 'roadway before the concrete is spread, and the concrete when it is spread completely embeds the parting strip. The upper edge of the strip ordinarily extends about one quarter of an inch below the ultimate road surface. This is sufliciently indicated in Fig. I, where C indicates the body of concrete.

The lengths of V-shaped channel of which the parting strip is composed are slotted at their ends and in their upper and lower marginal flanges by longitudinal extending 'slots 3. These slots are so placed that when the lengths of channel are brought end to end, in assembled position, the slots of the two lengths come to alignment. Keys 4 are pro- 0 vided to enter the aligned slots and so to integrate the whole. These keys are conveniently formed of rolled sheet steel, essentially such material as that which constitutes the strips themselves. The keys are of channel form and'come to the positions clearly shown in Fig. I. The upper key may con veniently, for cooperation with the marker of my present invention, be flared somewhat, to a V-shaped channel.

The marker of my invention consists essentially of a plate 7 of suitable metalof aluminium, of bronze, of rustless steel, or other metalconveniently, though not necessarily, circular in shape and of suitable size, say two inches and a half in diameter. It may conveniently be a quarter of an inch thickthe dimension, be it noted, at which the upper edge of the parting strip is depressed below the road surface. This plate may be cut from a rolled sheet or may be otherwise fabricated. The plate is provided with opposite, inwardly extending tongues 8.

When in the course of road-building a parting strip has been assembled and staked to place on the sub-grade, then, before the concrete is spread, the markers? are applied. The disk is brought to position, resting upon the upper edge of the parting strip and in that position it is secured by ben ing the tongues 8 and causing them to interlock with the edges of the upper key 4, as clearly shown in the drawings. When thereafter the concrete is spread and the roadcompleted the marker will line embedded in concrete, its upper surface flush with the road surface. The spaces between the marker with its tongues and the parting strip with its keys are freely accessible to the ingress of concrete, and in the spreading of the road these spaces 'will be carefully filled, so that the structure is completely and firmly embedded. The upper of the two keys 4; may, as is clearly shown in Fig. I, be spread somewhat, so that its outer edges stand away from the surface of the parting strip, and as is clearly shown in Fig. I, the proportions may be such that the tongues 8, when they are bent to engagement with the key 4, shall bear upon the opposite surfaces of the flange of the parting strip, and so the structure will be securely integrated.

The channel of which the parting strip is essentially composed is ordinarily available in 15-foot lengths. If then a marker be provided at each union of length to length there will be in the finished road a succession of marker plates set along the mid-line of the roadway, at intervals of 15 feet. This may and ordinarily will suffice, to afford demarcation of two lines of travel, one from the other. If it is desired to have the markers set-in closer succession than that fixed by the length of the pieces of angle 1, the upper web of the In hand.

y LEONARD'G. WOODS.

angle may be slotted intermediate its ends,

and extra members 4 inserted, to afford anchorage for extra mark-er plates.

The structure of Figs. IV, V, and VI differs from that of Figs. I, II, and III only in that the marker plate 7 is provided with additional outward extending tongues 9, which in the assembly extend obliquely downward.

These, embedded in the concrete, afi'ord additional rigidity to the structure.

It is common practice on heavily travelled highways to indicate the mid-line of the road, particularly on curves and over hill-crests, by painting a line along the surface. The painted line requires constant attention. It

must be renewed to prevent obliteration, and

it becomes a considerable item in cost of maintenance. The marker of my invention is relatively permanent and remains always in condition. y

I claim as my invention:

1. The combination with a roadway formed of plastic material having a parting strip embedded beneath its surface and ex-' tending longitudinally thereof, of a succession of markers secured at intervals to said parting strip.

2. The combination with a roadway formed of plastic material having a parting strip embedded beneath its surface and extending longitudinally thereof, said strip consisting of a succession oflengths of material united by keys, of a succession of markers consisting each of a plate with tongues extending from them and engaging each a key of the parting strip, the said markers being embedded in the roadway. 

